Exhaust guide with burnt hole in it

[jcclub47]

I have a 2005 VMAX V150TLRD with 710 hours on it. I have a burned a hole in the exhaust guide allowing smoke to fill cowling. I had to turn up the idle to keep it running. It is missing and running rough and I'm not sure if this is a symptom of the exhaust leak or something else. Do I have to pull the motor to replace the exhaust guide ? Can anyone direct me to a procedure to fix the exhaust guide ?

Thanks
Jcclub47

[backwoods]

The only way you will be able to repair the exhaust guide would be removal of the cylinder head and take the head to a reputable machine shop. Investigate marine machine shop services.
If you are doing it yourself also invest in a good repair manual preferably one specific to your engine.

[boscoe99]

The power plant has to be removed to gain access to the exhaust guide which is in the mid-section. Removal of just a cylinder head won't do it.

You will need a Yamaha service manual but there are no step by step procedures listed in there that address this specific part.

[jcclub47]

Exhaust Guide

Thank's, you pretty much confirmed my thinking. Can water get into the cylinders from the lower level of the exhaust guide ?